Four structures are given in options (a) to (d). Examine them and select the aromatic structures.
a. | b. | ||
c. | d. |
Choose the correct option
1. | (a, b) | 2. | (b, c) |
3. | (c, d) | 4. | (a, c) |
The molecules having dipole moment are ________
a. 2,2-Dimethylpropane
b. trans-Pent-2-ene
c. cis-Hex-3-ene
d. 2,2,3,3 - Tetramethylbutane
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Correct statement among the following is:
a. | CH3-O-CH2⊕ is more stable than CH3-CH2⊕ |
b. | (CH3)2CH⊕ is less stable than CH3-CH2-CH2⊕ |
c. | CH2=CH-CH2⊕ is more stable than CH3-CH2-CH2⊕ |
d. | CH2 = CH⊕ is more stable than CH3-CH2⊕ |
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
In an electrophilic substitution reaction of nitrobenzene, the presence of nitro group:
(a) | Deactivates the ring by inductive effect. |
(b) | Activates the ring by inductive effect. |
(c) | Decreases the charge density at ortho and para position of the ring relative meta position by resonance. |
(d) | Increases the charge density at meta position relative to the ortho and para positions of the ring by resonance. |
Choose the correct option:
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
For an electrophilic substitution reaction, the presence of a halogen atom in the benzene ring:
A. | Deactivates the ring by inductive effect |
B. | Deactivates the ring by resonance |
C. | Increases the charge density at ortho and para position relative to meta position by resonance. |
D. | Directs the incoming electrophile to meta position by increasing the charge density relative to ortho and para position. |
Choose the correct option
1. (A, B)
2. (B, C)
3. (C, D)
4. (A, C)
Which are the IUPAC names of the following compounds?
a. 5-(2',2'-Dimethylpropyl)decane
b. 4-Butyl-2,2-dimethylnonane
c. 2,2-Dimethyl -4- pentyloctane
d. 5-Neopentyldecane
Choose the correct option
1. | (a, b) | 2. | (b, c) |
3. | (c, d) | 4. | (a, d) |
Which are the correct IUPAC names of the following compound?
a. 5-Butyl-4-isoporpyldecane
b. 5-Ethyl-4-propyldecane
c. 5-sec-Butyl -4- iso-propyldecane
d. 4-(1-Methylethyl) - 5 - (1-methylpropyl)decane
Choose the correct option
1. | (a, b) | 2. | (b, c) |
3. | (c, d) | 4. | (a, c) |
Which of the following alkenes on ozonolysis give mixture to give a mixture of ketones only?
a. | b. | ||
c. | d. |
Choose the correct option
1. | (a, b) | 2. | (b, c) |
3. | (c, d) | 4. | (a, c) |
Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?
a. | CH4(g) + 2O2(g) → CO2(g) + 2H2O(l) |
b. | CH4(g) + O2(g) → C(s) + 2H2O(l) |
c. | CH4(g) + O2(g) \(\xrightarrow[]{Mo_{2}O_{3}}\) HCHO + H2O |
d. | 2CH4(g) + O2(g) \(\xrightarrow[]{Cu/523 \ K/ 100 \ atm}\)2CH3OH |
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Given below are two statements:
Assertion (A): | Among isomeric pentanes, 2,2-dimethylpropane has the highest boiling point. |
Reason (R): | Branching does not affect the boiling point. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | Both (A) and (R) are False. |
4. | (A) is True but (R) is False. |